<style>
#city_box select{
    display: inline-block;
    height: 32px;
    margin-right: 1.6px;
    width: 32%;
}
#city_box .error_red{
    border: 1px solid #b94a48;
    box-shadow: 0 0 6px #f8b9b7;
}
</style>    
                       
                        <span id="city_box" ng-show="!!required">
    						<select ng-model='selectedArea' ng-change="changeArea(selectedArea);">
                            <option value="" selected>--选择省份--</option>
                            <option value="{{$index}}" ng-repeat="area in areaList track by $index">{{area.province_name}}</option>
                            </select>
    						<select ng-model="selectedCity" ng-change="changeCity(selectedCity);">
                            <option value="" selected>--选择城市--</option>
                            <option value="{{$index}}" ng-repeat="city in cityList track by $index">{{city.city_name}}</option>
                            </select>
    						<select ng-model="selectedDistrict">
                            <option value="" selected>--选择地区--</option>
                            <option value="{{$index}}" ng-repeat="district in districtList track by $index">
                            {{district.district_name}}</option>
                            </select>
    					</span>
                        
                            <span id="city_box" ng-show="!!!required">
                            
                            <select ng-model='selectedArea' ng-change="changeArea(selectedArea);"
                            >
                            <option value="" selected>--选择省份--</option>
                            <option value="{{$index}}" ng-repeat="area in areaList track by $index">{{area.province_name}}</option>
                            </select>
                           
                            <select ng-model="selectedCity" ng-change="changeCity(selectedCity);"
                            >
                            <option value="" selected>--选择城市--</option>
                            <option value="{{$index}}" ng-repeat="city in cityList track by $index">{{city.city_name}}</option>
                            </select>
                          
                            <select ng-model="selectedDistrict">
                            <option value="" selected>--选择地区--</option>
                            <option value="{{$index}}" ng-repeat="district in districtList track by $index">
                            {{district.district_name}}</option>
                            </select>
                            
                        </span>
                